Komet, Trainwreck "Songwriter"

[FUCHSAUDIO]

That's cute, but not the one I recall. There was one Standell amp that had dedicated high and low preamp stages (filtered high and low), and a volume control for each (acting as low and high controls) and then a common master. They acted as bass and treble controls and worked pretty nicely. Forget the model, but always wanted to noodle with that circuit at some point.

[riscado]

You probably mean something like this...

[img:800:593]http://i211.photobucket.com/albums/bb13 ... ematic.jpg[/img]

I'm not really sure this is where Ken aimed at when he developed the songwriter though. I'm guessing it's something much less complex.

[FUCHSAUDIO]

That's the one....

[riscado]

Even thought I don't think that's the topology Ken used, it does look like and interesting circuit.

[andrew]

Hi, I can't seem to make out the cap value between the 270k anode and the 150k on the Bass control. Any help please. Thanks.

[guitardude57]

looks like .1

[andrew]

Hi, Could someone show me how to wire the input resistors for a single input on the Standel 25L15 clone from riscado's above post? Thank you.

[rooster]

Really....? That preamp can't be right can it? Without a load resistor at pins 3/7, and then looking at the 12AU7 PI, how could this amp have enough gain be gig-able? Too, look at the power supply filtering at point 'D' - how odd is that, 44uf? I think something is amiss here.

Has anybody built this?

[tictac]

The 12AX7 grids are sharing a 100k grid resistor. The PI seems to be set up more for a 12AX7 but you see lots of 12AU7 circuits like that.

The Standels were supposed to be clean amps, squeaky clean; and this circuit looks like it would produce plenty of gain to drive those sensitive 15" JBL's...

TT

[andrew]

I am just interested in the unusual tone controls. I have a Clubman clone and I would like to try it. Thanks.[/i]

[andrew]

http://www.ampbooks.com/home/classic-ci ... one-stack/ more info.